How to remove grid 12.2 after an 18c upgrade

Posted in: Technical Track

The environment started with a GRID 12.1.0.1 installation, upgraded to 18.3.0.0, and performed out-of-place patching (OOP) to 18.6.0.0.

As a result, there are three GRID homes and, ideally, we should remove 12.1.0.1 to save space because it’s longer required.

This demonstration will be for the last node from the cluster; however, the action performed will be the same for all nodes.

Review existing patch for Grid and Database homes:

[oracle@racnode-dc1-1 ~]$ ssh racnode-dc1-2 "/media/patch/lspatches.sh"
+ . /media/patch/gi.env
++ set +x
The Oracle base has been set to /u01/app/oracle
ORACLE_SID=+ASM2
ORACLE_BASE=/u01/app/oracle
GRID_HOME=/u01/18.3.0.0/grid_2
ORACLE_HOME=/u01/18.3.0.0/grid_2
Oracle Instance alive for sid "+ASM2"
+ /u01/18.3.0.0/grid_2/OPatch/opatch version
OPatch Version: 12.2.0.1.17

OPatch succeeded.
+ /u01/18.3.0.0/grid_2/OPatch/opatch lspatches
29302264;OCW RELEASE UPDATE 18.6.0.0.0 (29302264)
29301643;ACFS RELEASE UPDATE 18.6.0.0.0 (29301643)
29301631;Database Release Update : 18.6.0.0.190416 (29301631)
28547619;TOMCAT RELEASE UPDATE 18.0.0.0.0 (28547619)
28435192;DBWLM RELEASE UPDATE 18.0.0.0.0 (28435192)
27908644;UPDATE 18.3 DATABASE CLIENT JDK IN ORACLE HOME TO JDK8U171
27923415;OJVM RELEASE UPDATE: 18.3.0.0.180717 (27923415)

OPatch succeeded.
+ . /media/patch/hawk.env
++ set +x
The Oracle base remains unchanged with value /u01/app/oracle
ORACLE_UNQNAME=hawk
ORACLE_SID=hawk2
ORACLE_BASE=/u01/app/oracle
ORACLE_HOME=/u01/app/oracle/12.1.0.1/db1
Oracle Instance alive for sid "hawk2"
+ /u01/app/oracle/12.1.0.1/db1/OPatch/opatch version
OPatch Version: 12.2.0.1.17

OPatch succeeded.
+ /u01/app/oracle/12.1.0.1/db1/OPatch/opatch lspatches
28731800;Database Bundle Patch : 12.1.0.2.190115 (28731800)
28729213;OCW PATCH SET UPDATE 12.1.0.2.190115 (28729213)

OPatch succeeded.
+ exit
[oracle@racnode-dc1-1 ~]$

Notice that the GRID home is /u01/18.3.0.0/grid_2 because this was the suggestion from OOP process.
Based on experience, it might be better to name GRID home with the correct version, i.e. /u01/18.6.0.0/grid

Verify cluster state is [NORMAL]:

[oracle@racnode-dc1-1 ~]$ ssh racnode-dc1-2 "/media/patch/crs_Query.sh"
+ . /media/patch/gi.env
++ set +x
The Oracle base has been set to /u01/app/oracle
ORACLE_SID=+ASM2
ORACLE_BASE=/u01/app/oracle
GRID_HOME=/u01/18.3.0.0/grid_2
ORACLE_HOME=/u01/18.3.0.0/grid_2
Oracle Instance alive for sid "+ASM2"
+ crsctl query crs releaseversion
Oracle High Availability Services release version on the local node is [18.0.0.0.0]
+ crsctl query crs softwareversion
Oracle Clusterware version on node [racnode-dc1-2] is [18.0.0.0.0]
+ crsctl query crs softwarepatch
Oracle Clusterware patch level on node racnode-dc1-2 is [2056778364].
+ crsctl query crs releasepatch
Oracle Clusterware release patch level is [2056778364] and the complete list of patches [27908644 27923415 28090523 28090553 28090557 28256701 28435192 28547619 28822489 28864593 28864607 29301631 29301643 29302264 ] have been applied on the local node. The release patch string is [18.6.0.0.0].
+ crsctl query crs activeversion -f
Oracle Clusterware active version on the cluster is [18.0.0.0.0]. The cluster upgrade state is [NORMAL]. The cluster active patch level is [2056778364].
+ exit
[oracle@racnode-dc1-1 ~]$

Check Oracle Inventory:

[oracle@racnode-dc1-2 ~]$ cat /etc/oraInst.loc
inventory_loc=/u01/app/oraInventory
inst_group=oinstall

[oracle@racnode-dc1-2 ~]$ cat /u01/app/oraInventory/ContentsXML/inventory.xml
<?xml version="1.0" standalone="yes" ?>
<!-- Copyright (c) 1999, 2019, Oracle and/or its affiliates.
All rights reserved. -->
<!-- Do not modify the contents of this file by hand. -->
<INVENTORY>
<VERSION_INFO>
   <SAVED_WITH>12.2.0.4.0</SAVED_WITH>
   <MINIMUM_VER>2.1.0.6.0</MINIMUM_VER>
</VERSION_INFO>
<HOME_LIST>

### GRID home (/u01/app/12.1.0.1/grid) to be removed.
========================================================================================
<HOME NAME="OraGI12Home1" LOC="/u01/app/12.1.0.1/grid" TYPE="O" IDX="1">
   <NODE_LIST>
      <NODE NAME="racnode-dc1-1"/>
      <NODE NAME="racnode-dc1-2"/>
   </NODE_LIST>
</HOME>
========================================================================================

<HOME NAME="OraDB12Home1" LOC="/u01/app/oracle/12.1.0.1/db1" TYPE="O" IDX="2">
   <NODE_LIST>
      <NODE NAME="racnode-dc1-1"/>
      <NODE NAME="racnode-dc1-2"/>
   </NODE_LIST>
</HOME>
<HOME NAME="OraGI18Home1" LOC="/u01/18.3.0.0/grid" TYPE="O" IDX="3"/>
<HOME NAME="OraHome1" LOC="/u01/18.3.0.0/grid_2" TYPE="O" IDX="4" CRS="true"/>
</HOME_LIST>
<COMPOSITEHOME_LIST>
</COMPOSITEHOME_LIST>
</INVENTORY>
[oracle@racnode-dc1-2 ~]$

Remove GRID home (/u01/app/12.1.0.1/grid). Use -local flag to avoid any bug issues.

[oracle@racnode-dc1-2 ~]$ export ORACLE_HOME=/u01/app/12.1.0.1/grid
[oracle@racnode-dc1-2 ~]$ $ORACLE_HOME/oui/bin/runInstaller -detachHome -silent -local ORACLE_HOME=$ORACLE_HOME
Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 16040 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
'DetachHome' was successful.
[oracle@racnode-dc1-2 ~]$

Verify GRID home was removed:

[oracle@racnode-dc1-2 ~]$ cat /u01/app/oraInventory/ContentsXML/inventory.xml
<?xml version="1.0" standalone="yes" ?>
<!-- Copyright (c) 1999, 2014, Oracle and/or its affiliates.
All rights reserved. -->
<!-- Do not modify the contents of this file by hand. -->
<INVENTORY>
<VERSION_INFO>
   <SAVED_WITH>12.1.0.2.0</SAVED_WITH>
   <MINIMUM_VER>2.1.0.6.0</MINIMUM_VER>
</VERSION_INFO>
<HOME_LIST>
<HOME NAME="OraDB12Home1" LOC="/u01/app/oracle/12.1.0.1/db1" TYPE="O" IDX="2">
   <NODE_LIST>
      <NODE NAME="racnode-dc1-1"/>
      <NODE NAME="racnode-dc1-2"/>
   </NODE_LIST>
</HOME>
<HOME NAME="OraGI18Home1" LOC="/u01/18.3.0.0/grid" TYPE="O" IDX="3"/>
<HOME NAME="OraHome1" LOC="/u01/18.3.0.0/grid_2" TYPE="O" IDX="4" CRS="true"/>

### GRID home (/u01/app/12.1.0.1/grid) removed.
================================================================================
<HOME NAME="OraGI12Home1" LOC="/u01/app/12.1.0.1/grid" TYPE="O" IDX="1" REMOVED="T"/>
================================================================================

</HOME_LIST>
<COMPOSITEHOME_LIST>
</COMPOSITEHOME_LIST>
</INVENTORY>
[oracle@racnode-dc1-2 ~]$

Remove 12.1.0.1 directory:

[oracle@racnode-dc1-2 ~]$ sudo su -
Last login: Thu May  2 23:38:22 CEST 2019
[root@racnode-dc1-2 ~]# cd /u01/app/
[root@racnode-dc1-2 app]# ll
total 12
drwxr-xr-x  3 root   oinstall 4096 Apr 17 23:36 12.1.0.1
drwxrwxr-x 12 oracle oinstall 4096 Apr 30 18:05 oracle
drwxrwx---  5 oracle oinstall 4096 May  2 23:54 oraInventory
[root@racnode-dc1-2 app]# rm -rf 12.1.0.1/
[root@racnode-dc1-2 app]#

Check the cluster:

[root@racnode-dc1-2 app]# logout
[oracle@racnode-dc1-2 ~]$ . /media/patch/gi.env
The Oracle base has been set to /u01/app/oracle
ORACLE_SID=+ASM2
ORACLE_BASE=/u01/app/oracle
GRID_HOME=/u01/18.3.0.0/grid_2
ORACLE_HOME=/u01/18.3.0.0/grid_2
Oracle Instance alive for sid "+ASM2"
[oracle@racnode-dc1-2 ~]$ crsctl check cluster -all
**************************************************************
racnode-dc1-1:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
racnode-dc1-2:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
[oracle@racnode-dc1-2 ~]$

In conclusion, don’t forget to remove any obsolete installation when no longer required to save space.

Later, /u01/18.3.0.0/grid will be removed, too, if there are no issues with the most recent patch.

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4 Comments. Leave new

José Antonio
August 20, 2019 1:57 pm

Hello Michael!

Thank you very much for your article. I have a doubt. Why don’t you use deinstall tool from the grid home you are deinstalling?

Thank you!

Regards,
José Antonio

Reply

Thanks Jose for you comments.

At first, I thought I was just being the lazy DBA.

Please find Oracle Doc Last Update: Feb 8, 2019 to hopefully address your question:
How to Deinstall Oracle Clusterware Home Manually (Doc ID 1364419.1)
How to Deinstall Old Clusterware Home Once Upgrade to Newer Version is Complete (Doc ID 1346305.1)

To answer: Why don’t you use deinstall tool from the grid home you are deinstalling?

I have not not tried it but interesting concept. There are no GUI for guided access for most environments work with; hence, detach and remove directory seem simpler.

-Michael.

Reply
José Antonio
August 23, 2019 1:01 am

Hello Michael,

Thank you very much for your answer and the references. The tool I told you about (deinstall) is not GUI it is just a plain shell script.

May be you are right and it is simpler and quicker to do it the way you explain in the post. I’m going to try both because I have several grids to deinstall.

Thanks!

Regards,
José Antonio

Reply

Thanks Jose for clarification and reminder.

I have not used it since 2013 and have forgotten about it.

https://mdinh.wordpress.com/2013/08/06/12c-deinstall/

Going to try this with /u01/app/19.3.0.0/grid_2/deinstall after downgrade to 12.2.

-Michael.

Reply

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